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Finding the Fourth Proportional to 1,402,776.04, 1,935,948.90 and 858,909.16

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Solution

The fourth proportional to 1,402,776.04, 1,935,948.90 and 858,909.16 is: 1,185,366.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,402,776.04 : 1,935,948.90 = 858,909.16 : x
  2. Step 2: Convert to fraction form
    1,402,776.04/1,935,948.90 = 858,909.16/x
  3. Step 3: Cross multiply
    1,402,776.04x = 1,935,948.90 × 858,909.16
  4. Step 4: Simplify right side
    1,402,776.04x = 1,662,804,243,501.92
  5. Step 5: Solve for x
    x = 1,662,804,243,501.92/1,402,776.04
  6. Step 6: Final answer
    x = 1,185,366.87

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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.