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Finding the Fourth Proportional to 708,221.76, 977,345.60 and 385,931.36

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Solution

The fourth proportional to 708,221.76, 977,345.60 and 385,931.36 is: 532,585.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,221.76 : 977,345.60 = 385,931.36 : x
  2. Step 2: Convert to fraction form
    708,221.76/977,345.60 = 385,931.36/x
  3. Step 3: Cross multiply
    708,221.76x = 977,345.60 × 385,931.36
  4. Step 4: Simplify right side
    708,221.76x = 377,188,316,598.02
  5. Step 5: Solve for x
    x = 377,188,316,598.02/708,221.76
  6. Step 6: Final answer
    x = 532,585.04

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.