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Finding the Fourth Proportional to 868,931.80, 1,303,397.70 and 805,946.20

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Solution

The fourth proportional to 868,931.80, 1,303,397.70 and 805,946.20 is: 1,208,919.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,931.80 : 1,303,397.70 = 805,946.20 : x
  2. Step 2: Convert to fraction form
    868,931.80/1,303,397.70 = 805,946.20/x
  3. Step 3: Cross multiply
    868,931.80x = 1,303,397.70 × 805,946.20
  4. Step 4: Simplify right side
    868,931.80x = 1,050,468,423,403.74
  5. Step 5: Solve for x
    x = 1,050,468,423,403.74/868,931.80
  6. Step 6: Final answer
    x = 1,208,919.30

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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.