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Finding the Fourth Proportional to 978,870,711.50, 1,350,874,211.35 and 549,783,616.66

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Solution

The fourth proportional to 978,870,711.50, 1,350,874,211.35 and 549,783,616.66 is: 758,719,717.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,870,711.50 : 1,350,874,211.35 = 549,783,616.66 : x
  2. Step 2: Convert to fraction form
    978,870,711.50/1,350,874,211.35 = 549,783,616.66/x
  3. Step 3: Cross multiply
    978,870,711.50x = 1,350,874,211.35 × 549,783,616.66
  4. Step 4: Simplify right side
    978,870,711.50x = 742,688,509,565,021,184
  5. Step 5: Solve for x
    x = 742,688,509,565,021,184/978,870,711.50
  6. Step 6: Final answer
    x = 758,719,717.36

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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.