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Finding the Fourth Proportional to 630,615.15, 870,268.13 and 358,722.45

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Solution

The fourth proportional to 630,615.15, 870,268.13 and 358,722.45 is: 495,047.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,615.15 : 870,268.13 = 358,722.45 : x
  2. Step 2: Convert to fraction form
    630,615.15/870,268.13 = 358,722.45/x
  3. Step 3: Cross multiply
    630,615.15x = 870,268.13 × 358,722.45
  4. Step 4: Simplify right side
    630,615.15x = 312,184,713,956.91
  5. Step 5: Solve for x
    x = 312,184,713,956.91/630,615.15
  6. Step 6: Final answer
    x = 495,047.91

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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.