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Finding the Fourth Proportional to 975,356.64, 1,345,248 and 839,613.60

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Solution

The fourth proportional to 975,356.64, 1,345,248 and 839,613.60 is: 1,158,026.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    975,356.64 : 1,345,248 = 839,613.60 : x
  2. Step 2: Convert to fraction form
    975,356.64/1,345,248 = 839,613.60/x
  3. Step 3: Cross multiply
    975,356.64x = 1,345,248 × 839,613.60
  4. Step 4: Simplify right side
    975,356.64x = 1,129,488,516,172.80
  5. Step 5: Solve for x
    x = 1,129,488,516,172.80/975,356.64
  6. Step 6: Final answer
    x = 1,158,026.17

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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.