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Finding the Fourth Proportional to 651,639.70, 977,459.55 and 402,462.10

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Solution

The fourth proportional to 651,639.70, 977,459.55 and 402,462.10 is: 603,693.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,639.70 : 977,459.55 = 402,462.10 : x
  2. Step 2: Convert to fraction form
    651,639.70/977,459.55 = 402,462.10/x
  3. Step 3: Cross multiply
    651,639.70x = 977,459.55 × 402,462.10
  4. Step 4: Simplify right side
    651,639.70x = 393,390,423,158.06
  5. Step 5: Solve for x
    x = 393,390,423,158.06/651,639.70
  6. Step 6: Final answer
    x = 603,693.15

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.