Home / 720,465,473.64-994,243,204.08-390,440,612.64

Finding the Fourth Proportional to 720,465,473.64, 994,243,204.08 and 390,440,612.64

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Solution

The fourth proportional to 720,465,473.64, 994,243,204.08 and 390,440,612.64 is: 538,808,506.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,465,473.64 : 994,243,204.08 = 390,440,612.64 : x
  2. Step 2: Convert to fraction form
    720,465,473.64/994,243,204.08 = 390,440,612.64/x
  3. Step 3: Cross multiply
    720,465,473.64x = 994,243,204.08 × 390,440,612.64
  4. Step 4: Simplify right side
    720,465,473.64x = 388,192,925,714,151,744
  5. Step 5: Solve for x
    x = 388,192,925,714,151,744/720,465,473.64
  6. Step 6: Final answer
    x = 538,808,506.33

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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.