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Finding the Fourth Proportional to 518,343.60, 715,313.52 and 291,990.72

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Solution

The fourth proportional to 518,343.60, 715,313.52 and 291,990.72 is: 402,946.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,343.60 : 715,313.52 = 291,990.72 : x
  2. Step 2: Convert to fraction form
    518,343.60/715,313.52 = 291,990.72/x
  3. Step 3: Cross multiply
    518,343.60x = 715,313.52 × 291,990.72
  4. Step 4: Simplify right side
    518,343.60x = 208,864,909,730.53
  5. Step 5: Solve for x
    x = 208,864,909,730.53/518,343.60
  6. Step 6: Final answer
    x = 402,946.83

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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.