Home / 390,208,067.20-585,312,100.80-326,718,582.40

Finding the Fourth Proportional to 390,208,067.20, 585,312,100.80 and 326,718,582.40

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Solution

The fourth proportional to 390,208,067.20, 585,312,100.80 and 326,718,582.40 is: 490,077,873.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,208,067.20 : 585,312,100.80 = 326,718,582.40 : x
  2. Step 2: Convert to fraction form
    390,208,067.20/585,312,100.80 = 326,718,582.40/x
  3. Step 3: Cross multiply
    390,208,067.20x = 585,312,100.80 × 326,718,582.40
  4. Step 4: Simplify right side
    390,208,067.20x = 191,232,339,834,941,888
  5. Step 5: Solve for x
    x = 191,232,339,834,941,888/390,208,067.20
  6. Step 6: Final answer
    x = 490,077,873.60

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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.