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Finding the Fourth Proportional to 651,636.70, 977,455.05 and 402,459.10

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Solution

The fourth proportional to 651,636.70, 977,455.05 and 402,459.10 is: 603,688.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,636.70 : 977,455.05 = 402,459.10 : x
  2. Step 2: Convert to fraction form
    651,636.70/977,455.05 = 402,459.10/x
  3. Step 3: Cross multiply
    651,636.70x = 977,455.05 × 402,459.10
  4. Step 4: Simplify right side
    651,636.70x = 393,385,679,713.46
  5. Step 5: Solve for x
    x = 393,385,679,713.46/651,636.70
  6. Step 6: Final answer
    x = 603,688.65

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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.